Machine for making cement blocks.



PATENTED NOV. 14, 1905.

J. MILLER. MACHINE FOR MAKING CEMENT BLOCKS.

APPLIOATION FILED JAN.7. 1905.

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/ g1; @WWJ US No 804,423. PATENTED NOV. 14, 1905. J. MILLER.

MACHINE FOR MAKING CEMENT BLOCKS.

APPLICATION FILED JAN.7. 1905.

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. Enuzntnr ttmmz M y; @WW g WW No. 804,423. PATENTED NOV. 14, 1905. J.MILLER. MACHINE FOR MAKING CEMENT BLOCKS.

APPLICATION FILED JAN. 7. 1905.

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UNITED STATES PATENT OFFICE.

MACHINE FOR MAKING CEMENT BLOCKS.

Application filed a y 1905- To all whom it may concern:

Be it known that I, JOHN MILLER, a citizen of the United States,residing at Minneapolis, county of Hennepin, State of Minnesota, haveinvented a certain new and useful Improvement in Machines for MakingCement Blocks; and I declare the following to be a full, clear, andeXact description of the invention, such as will enable others skilledin the art to which it pertains to make and use the same, referencebeing bad to the accompanying drawings, which form a part of thisspecification.

My invention relates to an improvement in machines for making hollowcement blocks shown in the accompanying drawings and more particularlyset forth and described in the following specification and claims.

In the drawings, Figure 1 is a perspective view of the machine, showingthe top of the molding-box removed and the partitions in place forforming what is known as a veneer stone. Fig. 2 is a similar view of thetop of the machine, showing one of the sides of the molding-box and thedividing-partitions removed. Fig. 3 is a longitudinal section of themachine. Fig. 4 is a cross-sectional view of the machine on line 4 iofFig. 3 looking in the direction indicated by the arrows. Fig. 5 is aperspective view of the raising and supporting mechanism inclosed Withinthe frame of the machine, the frame being broken away, but indicated indotted lines, to disclose the mechanism.

One of the objects of my invention is to provide means which by theoperation of a lever will remove the sides of the moldingbox in orderthat the green block, with the base-board, may be readily removed to bereplaced by another molding-box base-board to receive a new block.

Another feature of my invention is the means employed to' form twoveneer stones at one operation.

A further object of my invention is the means employed to raise andsupport the cores used in forming the hollow blocks.

Referring to the letters of reference shown in the drawings, A is theframe of the machine. B represents the cores, preferably hollow andsupported on a cross member 0, having depending legs C traveling in asuitable guide D, secured to the upright walls of machine.

E represents forked arms mounted on a shaft It, operated by a lever B,having a Specification of Letters Patent.

Patented Nov. 14, 1905.

Serial No. 240,043.

short arm 6 for convenience in operating the same by the foot. As shownin Figs. 4 and 5 of the drawings, the tines of the forked arms E engagethe cross member (l at a point Where it is provided with a circularformation, whereby it is more readily embraced and operated by themovement of the arms E.

F is a shaft mounted in suitable bearings and operated by a lever F.Mounted on the shaft F are dogs F designed to support the cross member Cand the cores B, mounted thereon, when the same are in an elevatedposition, as shown in Figs. 4 and 5.

G is the molding box or frame, consisting of the side walls G G and theend walls Gr G The inner face of the side and end walls may be providedwith arock-face or other formation, whereby the same surfaces areproduced in the resulting cement block. I prefer that the end walls Gmay be hinged, as shown at g, to one of the side walls of themolding-frame, as shown in Figs. 1 and 2.

g g are suitable swinging latches pivoted to the end wall G designed toengage correspondingly-constructed catches g g secured to the side wallsG.

II represents rods secured to the side walls G by screw-eyes h, in whichthe rods are loosely sleeved.

I I are cross members traveling in channels 6, formed in the table-topA. The side walls G of the molding-box are secured to the cross member Iby means of brackets I.

J is a shaft having its bearings in the frame of the machine andprovided with an operating-lever J.

J J 2 are rocking arms mounted on each end of the shaft J.

J J are forked arms pivoted in the frame of the machine and having alink connection J 4 J 4 with the rocking arms J As shown in Figs. 1, 2,and 4, the tines of the forked arms J straddle the rods H, and when theside walls of the molding-box are disen aged from the end walls byunlatching the loc ring-catch the walls may be spread apart by 0 cratingthe lever J, as shown by the dotte lines in Fig. 1.

K K are partitions dividing the moldingbox when it is desired to makewhat is known as veneer stone. These partitions are inserted in kerfscut in the cores B. When it is desired to make a complete block, thepartitions are removed.

Having indicated the several parts I will now describe the operation ofthe machine.

The cores B are raised to an elevated position by operating the lever EThe lever F is then thrown so that the upper ends of the dogs F aredirectly beneath the cross member C, on which the cores are mounted. Bythis means the cores are supported in their elevated position. Thebottom of the mold ing-board is thenput in place and the sides G, withtheir hinged ends, assembled, with the rods H supported by their eyes itand engaged by the forked arms J The lever J is then operated, bringingthe sides of the molding-box into proper position to form the block. Thecement is now introduced in the usual way and the block formed. After itis formed the side walls are freed from the block by again operating thelever J, when the side walls will occupy the position indicated by thedotted lines in Fig. 1. The block rests on the bottom .board of themolding-box and is now removed and allowed to dry and a new board isinserted in its place, when the operation just described is repeated.

Having thus described my invention, what I claim is 1. In a machine formaking cement blocks, the frame, a molding-box having removable side andend walls supported by cleats traveling in guides formed in the frame,means for spreading the walls of the molding-box apart for the removalof the cement block, consisting of bars removably engaged to the sidewalls, suitable lever mechanism engag ing said bars, whereby they may beforced apart or brought toward each other, and means for operating saidlever mechanism, substantially as described.

2. In a machine for making cement blocks, the frame, a molding-boxhaving removable side and end walls, the end walls beinghinged to one ofthe side walls, means for locking the side and end walls together whenassembled, means for spreading the walls of the molding box apart forthe removal of the cement block, consisting of independent barsremovably engaged to the side walls, suitable lever mechanism engagingsaid bars, and means for operating said lever mechanism whereby saidside walls may be spread apart or returned to their initial positions,substantially as described.

3. In a machine for making cement blocks, the frame, a molding-boxhaving removable side and end walls, said side walls supported by cleatstraveling in guides formed in the frame whereby the said walls may bespread apart or brought together, means for spreading apart the sidewalls to provide for the re moval of the cement block, a removablebottom section, cores mounted on a reciprocating member traveling insuitable guides, means for raising said member and the cores mountedthereon, consisting of a rocking lever engaging said reciprocatingmember, means for operating said rocking lever, means for holding saidcores in an elevated position consisting of swinging dogs mounted on asuitable shaft, and means for operating said shaft whereby said dogs arethrown under the reciprocating member when raised, substan tially asdescribed.

l. In a machine for making cement blocks, a molding-box provided withremovable side and end walls, means for spreading the walls apart forthe removal of the cement block consisting of bars removably secured tothe side walls, suitable lever mechanism engaging said bars, means foroperating said lever mechanism, cores mounted on a reciprocating membertraveling in guides secured to the frame, a slotted lever mechanismengaging said reciprocating member bywhich the same may be raised,swinging dogs mounted on a suitable shaft provided with means forthrowing said dogs under the reciprocatin member whereby the cores areheld in an e evated position while the block is being formed,substantially as described.

In testimony whereof I sign this specification in the presence of twowitnesses.

JOHN MILLER.

VVit-nesses S. E. THOMAS, ALLAN McLERIE.

